Process of producing lime or cement and fixed combustible gases.



No. 667,255. Patented Feb. 5, I901.

A. L. SCHUBERT & F. .1. PIERCE. PROCESS OF PRODUCING LIME 0R CEMENT AND FIXED CDMBUSTIBLE GASES.

A lication filed Aug. 21, 1900. (No Model.) 2 SheeisS hee't l.

m: uomus mans w. PHOTO-LUNG WASHINGTON,QA'..

UNrTED ALVIN LINCOLN SCHUBERT AND FRANK JOHN PIERCE, OF SACRAMENTO, CALIFORNIA.

PROCESS OF PRODUCING LIME OR CEMENT AND FIXED COMBUSTIBLE GASES.

SPECIFICATION forming part of Letters Patent No. 667,255, dated February 5, 1901.

Applicati fil d August 21, 1900. Serial No. 27,621. (No specimens.)

To all whom it may concern.-

Be it known that we, ALVIN LINCOLN SCHU- fennr and FRANK JOHN PIERCE, citizens of the United States, residing at Sacramento, in the county of Sacramento and State of California, have invented a new and useful Process of Producing Lime or Cement and Fixed Combustible Gases, of which the following is a specification.

Our invention is an improved process for producing lime or cement and fixed combustible gases. raw cement gases are produced which have heretofore been wasted.

The object of our invention is to utilize these gases and convert the same into fixed combustible gases adapted for use for heating, cooking, and lighting purposes.

Our invention consists in heating limestone or raw cement-and carbonaceous material, such as coal or coke, in suitable proportions in a closed chamber from which air has been excluded, thereby producing lime'or partiallyburned cement and certain gasessuch as carbonic-acid gas, coal-gases, and vapor of water-and passing the said gases and vapor of water through a body of incandescent coke in a closed chamber from which air is excluded, thereby converting the same into fixed combustible gases, such as carbonic-oxid gas, hydrogen gas, and finished coal-gas.

In the accompanying drawings, Figure l is a front elevation of a furnace designed for the carrying out of our improved process. Fig. 2 is a transverse sectional view'of the same.

Fig. 3 is a vertical longitudinal sectional view of the same, taken on the line a or of Fig. 2.

In the carrying out of our improved process we charge the retorts 1 with coal and raw cement or coal and lime-rock or coal, raw cement, and lime-rock. All of these materials contain gaseous matter, as is well known. The retorts 2 are charged with coke. The retorts l are connected together by valvetubes 3, disposed in front of the furnace and communicating with the mouths of said retorts, and the retorts 2 are also connected to the said pipes 3 by valved pipes 4:. Exhaust pipes or fines 5 lead from the rear ends of the retorts 4 to a suitable receiver, which is not here shown. Suitable exhausters, which are In the burning of limestone and not here shown, are employed in connection with the furnace to exhaust from the retorts 2. The retorts are located in an arched chamber 6, which communicates with a centrallydisposed fire-chamber 7 through flues 8, the products of combustionpassing from the firechamber 7 and through the arched chamber 6 and around the retorts and into the smokeescape flue 9.

In the working of our process the retorts 1 and 2 arev maintained at a high temperature, and the coke in the retorts 2 is maintained at the point of iucandescence. Said retorts being closed, it will be understood that air is excluded therefrom.

During the heating of the raw cement or limestone and coal or other carbonaceous material in retorts 1 certain gasessuch as carb nic-acid gas, coal-gas, and vapor of waterare evolved, which gases and vapor of water are passed from the retorts 1 into the retorts 2 and through the body of incandescent coke contained therein, and thus become converted thereby into fixed combustible gases suitable for heating, cooking, lighting, and kindredv purposes, which combustible gases are by the exhausters carried to the receiver and stored therein. 'After the gases have been distilled therefrom the residual coke and partially-burned cement are drawn from the retorts 1 and burned in the fire-chamber 7, where the cement is clinkered and the carbonaceous matter entirely consumed. It will be understood that while the initial charges of raw cement after being partly burned are being clinkered the heat evolved in the latter process is employed for maintaining the heat in the retorts 1 and 2 for subsequent charges of cement and coal, a sufficient quantity of coal being added to the partially-burned cement and coal in the fire-chamber 7 to mainrate application for Letters Patent of the United States which we are about to file.

Having thus described our invention, we claim- 1. The process herein described of making cement and fixed combustible gases, consisting in heating a mass of raw cement and carbonaceous material, as coal or coke, from which air is excluded, thereby distilling the gases therefrom, passing said gases through a mass of incandescent carbonaceous material, from which air is excluded, and subsequently clinkering the residuum of the material.

2. The process herein described of making cement and fixed combustible gases, consisting in heating a body of raw cement and carbonaceous material, as coal or coke, from: which air is excluded, thereby distilling the gases therefrom, passing said gases through a mass of incandescent material, from which; air is excluded, subsequently clinkering the residuum of the material and utilizing the coke, from which air is excluded, passing the gases arising therefrom through a mass of incandescent coke, from which air is excluded, and subsequently clinkering the residuum.

In testimony that We claim the foregoing as our own We have hereto affixed our signatures in the presence of two witnesses.

ALVIN LINCOLN SOHUBERT. FRANK JOHN PIERCE.

Witnesses:

G. E. KLEINSORGE, PETER BOHL. 

